01/21/25
Message Overview:
Message Description:
The 'ELECTRICAL FAULT' Amber CAS message indicates the Direct Current Power Center (DCPC) has failed, redundancy indications from the dual sensors are not available in the DCPC.
Possible Causes:
- Electrical System Components - Relays, Current Sensors, PCBs, Feeder Wires
- Left Direct Current Power Center (LDCPC) (A35)
- Right Direct Current Power Center (RDCPC) (A36) Printed Circuit Board (PCB) 6
- Right Direct Current Power Center (RDCPC) (A36)
- APU Direct Current Power Center (ADCPC) (A196)
- Proximity Sensor Electronic Unit (PSEU) (A9)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW300-24-0023 - Nuisance "ELECTRICAL FAULT" CAS Message During APU Start
- AW300-24-0024 - Electrical System - Troubleshooting Tips
- AW300-24-0034 - "ELECTRICAL FAULT" CAS Message When External Power is Connected
- AW300-24-0038 - Nuisance "ELECTRICAL FAULT" CAS Message Upon Engine or APU Shut Down
- AW300-24-0073 - SB100-24-08 - Modification of DC Power Center (DCPC) - System Reactivation
- AW300-24-0085 - DC Generator Shaft Spline Wear/Corrosion
- AW300-24-0326 - Generator Control Unit PN R3608-005
- AW300-24-0289 - Generator Failures During APU Start
- AW300-24-0141 - Rev 07 Electrical System and Flight Display Issues During Flight
- AW300-32-0255 - Data Collection for PSEU Failure
Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None
Flight Operation Notifications Manual (FONM): None
NOTES:
- The 'ELECTRICAL FAULT' Amber CAS message is a top-level message triggered by the failure of electrical system related component(s). The Aircraft Maintenance System must be consulted to determine which electrical system component(s) is/are failed.
- The System Description Section ATA 45 provides additional information in regard to the Aircraft Maintenance System, that can be used to navigate and interrogate the Aircraft Maintenance System. Current and historical records of Message Codes can be obtained as well as some component parameters
Quick Links:
| Data Download from the Maintenance Diagnostic Computer (MDC) | AMM 45-45-01-970-802 |
| Removal of the DC Power Center (DCPC) | AMM 24-61-01-000-801 |
| Installation of the DC Power Center (DCPC) | AMM 24-61-01-400-801 |
| Functional Test of the DC Power Center (DCPC) | AMM 24-61-01-720-801 |
| Removal of the Auxiliary DC Power Center (Aux DCPC) | AMM 24-64-01-000-801 |
| Installation of the Auxiliary DC Power Center (Aux DCPC) | AMM 24-64-01-400-801 |
| Operational Test of the Auxiliary DC Power Center (Aux DCPC) | AMM 24-64-01-710-801 |
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
| Electrical Connectors - Maintenance Practice - ALL | SPM 20-20-00-02 |
Troubleshooting Recommendations:
- Download and have field service or CRC review the complete MDC for all legs. Further troubleshooting will depend on results of the NVM.
- Interrogate the Aircraft Maintenance System per the AMM task.
- Reference the AMM task listing above.
- The System Description Section ATA 45 provides additional information in regard to the Aircraft Maintenance System.
- Select the Message Code(s) from the drop down below to provide additional information to assist in troubleshooting.
- If a Message Code was found posted in current faults and not listed in the drop down menu, navigate to the Message Code using the menu at top of application. [Troubleshooting > By MDC]
- If a Message Code was found posted in current faults and not listed in the drop down menu, navigate to the Message Code using the menu at top of application. [Troubleshooting > By MDC]
